Adding a 7-Way Trailer Connector to a 2017 Toyota Highlander Limited Platinum with 4-Way

Question

Question:

I already have the factory hitch and harness in place but would like to convert it to a 7 pole round connector. I will be pulling a T@B tear trailer without electric brakes. Which wires do I need to connect and which ones can I leave unattached? Do I still need any circuit breakers? Thanks for the help and information.

asked by: John R

0

Expert Reply:

To add a 7-Way connector to your 2017 Toyota Highlander which already has a 4-Way installed you will just need a few parts. First for the 7-Way you can use # 37185. This will add the 7-Way and retain the 4-Way should you need it.

If your trailer does not require 12 volt power then the only wire you will need to connect, other than the 4-Way, is the white ground wire which will go to a clean, bare metal surface.

If the trailer does need 12 volt power then in addition to the 37185 you will also need about 20 to 25 feet of 12 gauge wire # 12-1-1, sold by the foot, and circuit breaker # PK54540. You will also need some ring terminals and wiring tools so if you do not have those items I recommend kit # HM51020. Ground the white wire as explained above and then you will use the 12-1-1 wire to attach to the black wire on 37185. Route the wire to the vehicle battery. You will need any leftover wire to go from the breaker to the positive battery terminal.

Attach a ring terminal to the end of the wire and secure it to the AUX post on the breaker. Using the leftover wire attach a ring terminal to one end and secure it to the BATT post on the breaker. The other end will then go to the positive battery terminal using another ring terminal.

I have included some links that will help. Please note that not all of the instructions in the links will apply to your installation.

expert reply by: Michael H

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Answer 1

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Answer 2

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Answer 3

Hey William, since your 2016 White Water Retro camper model 177 is 18 feet in length the Adco SFS AquaShed Cover part #290-52240 that you referenced would be a great fit and do a great job protecting your RV.

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Answer 4

It sounds like you may already have a 4 way connector on your vehicle, which is half of the battle. In order to operate the Curt Echo Mobile Wireless Brake Controller #C51180 you will need an almost fully functional 7 way connector; using something…

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Answer 5

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Answer 6

Hey Brian, To determine if you have a 12v or 24v system all you have to do is look at the battery. From what I can see your Yukon should have a 12v battery like most other passenger vehicles so the only other notable difference aside from the…

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Answer 7

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Answer 8

There's quite a bit of variance in the 2013 and newer Toyota Highlanders due to a gradual "Facelift" that occured in the vehicles, culminating in the 2017 model year's complete change in appearance. One of those changes was the…

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Answer 9

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 10

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 11

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 12

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Adding a 7-Way Trailer Connector to a 2017 Toyota Highlander Limited Platinum with 4-Way

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